altmem(4) - NetBSD Manual Pages

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ALTMEM(4)               NetBSD Kernel Interfaces Manual              ALTMEM(4)


NAME

     altmem -- Alternative memory disk driver


SYNOPSIS

     altmem* at altmemdev?


DESCRIPTION

     The altmem driver enables use of physical memory that is normally inac-
     cessible by the machine-dependent pmap(9) as a swap device.

     When an alternative memory disk device is present, this device is gener-
     ally preferred to hard disk-based swap space.  See the swapctl(8) and
     fstab(5) man pages for instructions on how to assign priorities to swap
     devices.


FILES

     /dev/altmem??   block mode alternative memory disk devices.
     /dev/raltmem??  raw mode alternative memory disk devices.


SEE ALSO

     md(4), fstab(5), swapctl(8)


HISTORY

     The altmem device driver appeared in NetBSD 6.0.


AUTHORS

     Jared D. McNeill <jmcneill@NetBSD.org>

NetBSD 6.0                      March 11, 2009                      NetBSD 6.0